Using gnuplot 4.6 patchlevel 1, with the following commands,
set grid linewidth 1 linecolor rgb"#888888"
set datafile separator ","
plot for [n=2:100] "data.csv" using 1:(column(n)) with lines linewidth 2
and the following example data in the file "data.csv",
time,S1,S2
0,0.00015,0
0.1,0.0001357256127053939,1.427438729460607e-005
0.2,0.0001228096129616973,2.719038703830272e-005
0.3,0.0001111227331022577,3.887726689774233e-005
0.4,0.0001005480069053459,4.945199309465411e-005
0.5,9.097959895689501e-005,5.902040104310499e-005
0.6,8.232174541410396e-005,6.767825458589604e-005
0.7,7.448779556871142e-005,7.551220443128858e-005
0.8,6.739934461758323e-005,8.260065538241677e-005
0.9,6.098544896108986e-005,8.901455103891014e-005
1,5.518191617571635e-005,9.481808382428365e-005
the resulting plot looks this:
Question: why does the grid only extend partway from the bottom, and not cover the whole plot? I tried a considerable amount of experimentation with the set xtics and ytics commands, arguments to grid, and more, and have not been able to get the grid to cover the whole plot. What am I missing?
Great question! In fact, the answer is that the grid does cover the whole plot. The problem is that the key is taking over. Try it again, but with an unset key in there before your plot command.
What's happening is that gnuplot is reserving space in the key for all of the columns which have no data. Nothing gets put in the space that was reserved since no reasonable data was found. Ultimately, this pushes the 2 lines that were visible out of the viewable canvas area as well.
I've reproduced this using the x11, png, postscript and pngcairo terminals.
Note that this behavior seems to be version dependent:
With gnuplot 4.4.2 (OS-X, png terminal)
With gnuplot 4.6.0 (OS-X, png terminal)
For those using gnuplot 4.4.4, perhaps there was a bug fix which made it work for gnuplot 4.4.4 and then a regression. It seems to persist into gnuplot 4.7.0 as well. I might file a bug report.
Related
This is my second question today, I thought about editing the other one with this info but the problems doesn't seem to be related... So, with this data file, and using this code:
set terminal qt
s=101
set size square
set palette rgb 34,35,36;
set zrange[-1.8e-5:1.8e-5]
set pm3d at sb
set autoscale fix
do for [i=0:0]{
splot 'itp.txt' u 1:2:3 every:::(i*s)::(s+i*s) notitle w pm3d
}
I get this black image. This is clearly not working properly... but if I slide my finger through my notebook's touchpad while in the qt's output interactive window, this image pops up, which is what I wanted. It seems to work everywhere, except when the graph fit the "canvas". Example 1 & example 2. I'm not even sure what sliding my fingers through the touchpad while on qt's output window does, but it seems to be fixing something. So what should I do? Thank you in advance!
*qt is the qt terminal in gnuplot
Looking at the two figures you posted, it seems that the effect has to do with a changing xrange. I copied your datafile and script, and adding:
set xrange[-200:300]
did the trick for me. Also, you may consider fixing (if at all possible) your color bar range, by adding:
set cbrange[xx:xx]
with your data, I tried:
set cbrange[0:1.8e-8]
and the result looks completely different. Hope this helps.
I wanted to get a scatter plot but the constraint is to plot these points over an image with same dimension as the range of points. Is is possible? If yes which library is good to start with? I tried using gnuplot but it is causing problems. For now I have a code which was stated here but didn't work. I tried using a bitmap image with the points to be plotted in data1.dat file and used the gnuplot script which is stated in the link
set terminal pngcairo transparent
set output 'Figure1.bmp'
plot "Co_ordinates0.dat"
set output
I am using gnuplot on a hidpi screen (276 dpi).
The plots I recover are hard to see properly, the lines too thin, the fonts and buttons too small.
Is there any way to configure gnuplot to scale up these parameters for hidpi screens automatically upon start?
gnuplot automatically loads an initialisation file on startup, that you can use to change the default linewidths etc. It accepts normal gnuplot syntax. Check help initialization to see how it's named and where to place it on your system.
Use e.g. set terminal wxt lw 2 to change the absolute default linewidth. The sizes given in a later plot command are just multiplicators for the terminal setting. The pointsize and border/tics linewidth are scaled accordingly.
I am using Gnuplot to successfully plot some time series data. However, the series are fairly dense (10,000's of samples in about 5 inches of space), and when I plot multiple series, it is hard to see underneath the series that was plotted on top. Is there any way to make the lines have a bit of opacity or transparency (i.e. make the line transparent so underneath lines are visible)?
Excel has this capability, but I would much prefer to use Gnuplot.
Below is a sample of what I'm talking about. You can't see the red lines under the green lines. I would actually like to add a third time series. I am plotting with the command:
plot [][-3:3] 'samples_all.csv' using 1:7 title 'horizontal' w l ls 1, '' using 1:8 title 'vertical' w l ls 2"
Good news! This has been implemented in gnuplot. Example syntax is
plot x lw 10, -x lw 10 lc rgb "#77000000"
This will plot x as a red line and -x as a transparent black line (it looks gray). The first pair of two characters in the rgb specification define the alpha (transparency) channel ("#AARRGGBB"). The normal syntax ("#RRGGBB") still works.
old (gnuplot < 5.0 or so) answer for reference:
If you want to make lines plotted for time series data, the answer is no (see discussion here). You can't set a line style to be transparent. Transparency only works for filling under curves, and it has to be printed to the right terminal type.
I ran into this problem myself recently, I hope this feature will be added in a future version of gnuplot.
This may be what you're looking for.
Do we have a facility to rotate the image, using mouse, to see different views in gnuplot.
I wish gnuplot had similar facility to rotate the image as MATLAB has.
In my version it just works.
Version 4.4 patchlevel 0
last modified March 2010
You might need to change the terminal for gnuplot.
The window with the nice toolbar is generated by the "wxt" terminal.
gnuplot> set term wxt
Use 'set term' without parameters to show a list of available terminals.
gnuplot> set term